diff --git a/SVSim.BattleEngine/Shim/UnityEngine/Primitives.cs b/SVSim.BattleEngine/Shim/UnityEngine/Primitives.cs
index 8479fbc..127aa1d 100644
--- a/SVSim.BattleEngine/Shim/UnityEngine/Primitives.cs
+++ b/SVSim.BattleEngine/Shim/UnityEngine/Primitives.cs
@@ -13,7 +13,7 @@ namespace UnityEngine
     public struct Quaternion
     {
         public float x, y, z, w;
-        public static Quaternion identity => new Quaternion();
+        public static Quaternion identity => new Quaternion { x=0, y=0, z=0, w=1 };
         public static Quaternion Euler(float x, float y, float z) => new Quaternion();
     }
     public struct Color { public float r, g, b, a; public Color(float r,float g,float b,float a){ this.r=r; this.g=g; this.b=b; this.a=a; } }